sdl_dx5events.c

linux下面的一个开源的多媒体中间件

				if ( mouse_buttons_swapped ) {
					if ( button == 1 ) button = 3;
					else
					if ( button == 3 ) button = 1;
				}
				posted = SDL_PrivateMouseButton(state, button,
									0, 0);
				break;
		}
	}
	if ( xrel || yrel ) {
		posted = SDL_PrivateMouseMotion( 0, 1, xrel, yrel);
	}
}

/* The main Win32 event handler */
LRESULT DX5_HandleMessage(_THIS, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch (msg) {
#ifdef WM_ACTIVATEAPP
		case WM_ACTIVATEAPP: {
			int i, active;

			active = (wParam && (GetForegroundWindow() == hwnd));
			if ( active ) {
				for ( i=0; SDL_DIdev[i]; ++i ) {
					IDirectInputDevice2_Acquire(
								SDL_DIdev[i]);
				}
			} else {
				for ( i=0; SDL_DIdev[i]; ++i ) {
					IDirectInputDevice2_Unacquire(
								SDL_DIdev[i]);
				}
				mouse_lost = 1;
			}
		}
		break;
#endif /* WM_ACTIVATEAPP */

#ifdef WM_DISPLAYCHANGE
		case WM_DISPLAYCHANGE: {
			WPARAM BitsPerPixel;
			WORD SizeX, SizeY;

			/* Ack!  The display changed size and/or depth! */
			SizeX = LOWORD(lParam);
			SizeY = HIWORD(lParam);
			BitsPerPixel = wParam;
			/* We cause this message when we go fullscreen */
		}
		break;
#endif /* WM_DISPLAYCHANGE */

		/* The keyboard is handled via DirectInput */
		case WM_SYSKEYUP:
		case WM_SYSKEYDOWN: {
			/* Pass syskey to DefWindwoProc (ALT-F4, etc.) */
		}
		break;
		case WM_KEYUP:
		case WM_KEYDOWN: {
			/* Ignore windows keyboard messages */;
		}
		return(0);

#if defined(SC_SCREENSAVE) || defined(SC_MONITORPOWER)
		/* Don't allow screen savers or monitor power downs.
		   This is because they quietly clear DirectX surfaces.
		   It would be better to allow the application to
		   decide whether or not to blow these off, but the
		   semantics of SDL_PrivateSysWMEvent() don't allow
		   the application that choice.
		 */
		case WM_SYSCOMMAND: {
			if ((wParam&0xFFF0)==SC_SCREENSAVE || 
			    (wParam&0xFFF0)==SC_MONITORPOWER)
				return(0);
		}
		/* Fall through to default processing */

#endif /* SC_SCREENSAVE || SC_MONITORPOWER */

		default: {
			/* Only post the event if we're watching for it */
			if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {
			        SDL_SysWMmsg wmmsg;

				SDL_VERSION(&wmmsg.version);
				wmmsg.hwnd = hwnd;
				wmmsg.msg = msg;
				wmmsg.wParam = wParam;
				wmmsg.lParam = lParam;
				posted = SDL_PrivateSysWMEvent(&wmmsg);

			/* DJM: If the user isn't watching for private
				messages in her SDL event loop, then pass it
				along to any win32 specific window proc.
			 */
			} else if (userWindowProc) {
				return CallWindowProc(userWindowProc, hwnd, msg, wParam, lParam);
			}
		}
		break;
	}
	return(DefWindowProc(hwnd, msg, wParam, lParam));
}

/* This function checks the windows message queue and DirectInput and returns
   1 if there was input, 0 if there was no input, or -1 if the application has
   posted a quit message.
*/
static int DX5_CheckInput(_THIS, int timeout, BOOL processInput)
{
	MSG msg;
	int      i;
	HRESULT  result;
	DWORD    event;

	/* Check the normal windows queue (highest preference) */
	posted = 0;
	while ( ! posted &&
	        PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) ) {
		if ( GetMessage(&msg, NULL, 0, 0) > 0 ) {
			DispatchMessage(&msg);
		} else {
			return(-1);
		}
	}
	if ( posted ) {
		return(1);
	}

	/* Pump the DirectInput flow */
	if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {
		for ( i=0; i<SDL_DIndev; ++i ) {
			result = IDirectInputDevice2_Poll(SDL_DIdev[i]);
			if ( (result == DIERR_INPUTLOST) ||
					(result == DIERR_NOTACQUIRED) ) {
				if ( SDL_strcmp(inputs[i].name, "mouse") == 0 ) {
					mouse_lost = 1;
				}
				IDirectInputDevice2_Acquire(SDL_DIdev[i]);
				IDirectInputDevice2_Poll(SDL_DIdev[i]);
			}
		}
	}

	/* Wait for messages and input events */
	event = MsgWaitForMultipleObjects(SDL_DIndev, SDL_DIevt, FALSE,
							timeout, QS_ALLEVENTS);
	if ((event >= WAIT_OBJECT_0) && (event < (WAIT_OBJECT_0+SDL_DIndev))) {
		DWORD numevents;
		static DIDEVICEOBJECTDATA evtbuf[INPUT_QSIZE];

		event -= WAIT_OBJECT_0;
		numevents = INPUT_QSIZE;
		result = IDirectInputDevice2_GetDeviceData(
				SDL_DIdev[event], sizeof(DIDEVICEOBJECTDATA),
							evtbuf, &numevents, 0);
		if ( (result == DIERR_INPUTLOST) ||
					(result == DIERR_NOTACQUIRED) ) {
			if ( SDL_strcmp(inputs[event].name, "mouse") == 0 ) {
				mouse_lost = 1;
			}
			IDirectInputDevice2_Acquire(SDL_DIdev[event]);
			result = IDirectInputDevice2_GetDeviceData(
				SDL_DIdev[event], sizeof(DIDEVICEOBJECTDATA),
							evtbuf, &numevents, 0);
		}
		/* Handle the events */
		if ( result == DI_OK && processInput ) {
			/* Note: This can post multiple events to event queue
			 */
			(*SDL_DIfun[event])((int)numevents, evtbuf);
			return(1);
		}
	}
	if ( event != WAIT_TIMEOUT ) {
		/* Maybe there was a windows message? */
		if ( PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) ) {
			if ( GetMessage(&msg, NULL, 0, 0) > 0 ) {
				DispatchMessage(&msg);
			} else {
				return(-1);
			}
			return(1);
		}
	}
	return(0);
}

/* Change cooperative level based on whether or not we are fullscreen */
void DX5_DInputReset(_THIS, int fullscreen)
{
	DWORD level;
	int i;
	HRESULT result;
	HWND topwnd;

	for ( i=0; i<MAX_INPUTS; ++i ) {
		if ( SDL_DIdev[i] != NULL ) {
			if ( fullscreen ) {
				level = inputs[i].raw_level;
			} else {
				level = inputs[i].win_level;
			}
			IDirectInputDevice2_Unacquire(SDL_DIdev[i]);
			topwnd = GetTopLevelParent(SDL_Window);
			result = IDirectInputDevice2_SetCooperativeLevel(
					SDL_DIdev[i], topwnd, level);
			IDirectInputDevice2_Acquire(SDL_DIdev[i]);
			if ( result != DI_OK ) {
				SetDIerror(
			"DirectInputDevice::SetCooperativeLevel", result);
			}
		}
	}
	mouse_lost = 1;

	/* Flush pending input */
	DX5_CheckInput(this, 0, FALSE);
}

void DX5_PumpEvents(_THIS)
{
	/* Wait for messages and DirectInput */
	while ( DX5_CheckInput(this, 0, TRUE) > 0 ) {
		/* Loop and check again */;
	}
}

void DX5_InitOSKeymap(_THIS)
{
#ifndef DIK_PAUSE
#define DIK_PAUSE	0xC5
#endif
#ifndef DIK_OEM_102
#define DIK_OEM_102	0x56	/* < > | on UK/Germany keyboards */
#endif
	int i;

	/* Map the DIK scancodes to SDL keysyms */
	for ( i=0; i<SDL_arraysize(DIK_keymap); ++i )
		DIK_keymap[i] = 0;

	/* Defined DIK_* constants */
	DIK_keymap[DIK_ESCAPE] = SDLK_ESCAPE;
	DIK_keymap[DIK_1] = SDLK_1;
	DIK_keymap[DIK_2] = SDLK_2;
	DIK_keymap[DIK_3] = SDLK_3;
	DIK_keymap[DIK_4] = SDLK_4;
	DIK_keymap[DIK_5] = SDLK_5;
	DIK_keymap[DIK_6] = SDLK_6;
	DIK_keymap[DIK_7] = SDLK_7;
	DIK_keymap[DIK_8] = SDLK_8;
	DIK_keymap[DIK_9] = SDLK_9;
	DIK_keymap[DIK_0] = SDLK_0;
	DIK_keymap[DIK_MINUS] = SDLK_MINUS;
	DIK_keymap[DIK_EQUALS] = SDLK_EQUALS;
	DIK_keymap[DIK_BACK] = SDLK_BACKSPACE;
	DIK_keymap[DIK_TAB] = SDLK_TAB;
	DIK_keymap[DIK_Q] = SDLK_q;
	DIK_keymap[DIK_W] = SDLK_w;
	DIK_keymap[DIK_E] = SDLK_e;
	DIK_keymap[DIK_R] = SDLK_r;
	DIK_keymap[DIK_T] = SDLK_t;
	DIK_keymap[DIK_Y] = SDLK_y;
	DIK_keymap[DIK_U] = SDLK_u;
	DIK_keymap[DIK_I] = SDLK_i;
	DIK_keymap[DIK_O] = SDLK_o;
	DIK_keymap[DIK_P] = SDLK_p;
	DIK_keymap[DIK_LBRACKET] = SDLK_LEFTBRACKET;
	DIK_keymap[DIK_RBRACKET] = SDLK_RIGHTBRACKET;
	DIK_keymap[DIK_RETURN] = SDLK_RETURN;
	DIK_keymap[DIK_LCONTROL] = SDLK_LCTRL;
	DIK_keymap[DIK_A] = SDLK_a;
	DIK_keymap[DIK_S] = SDLK_s;
	DIK_keymap[DIK_D] = SDLK_d;
	DIK_keymap[DIK_F] = SDLK_f;
	DIK_keymap[DIK_G] = SDLK_g;
	DIK_keymap[DIK_H] = SDLK_h;
	DIK_keymap[DIK_J] = SDLK_j;
	DIK_keymap[DIK_K] = SDLK_k;
	DIK_keymap[DIK_L] = SDLK_l;
	DIK_keymap[DIK_SEMICOLON] = SDLK_SEMICOLON;
	DIK_keymap[DIK_APOSTROPHE] = SDLK_QUOTE;
	DIK_keymap[DIK_GRAVE] = SDLK_BACKQUOTE;
	DIK_keymap[DIK_LSHIFT] = SDLK_LSHIFT;
	DIK_keymap[DIK_BACKSLASH] = SDLK_BACKSLASH;
	DIK_keymap[DIK_OEM_102] = SDLK_LESS;
	DIK_keymap[DIK_Z] = SDLK_z;
	DIK_keymap[DIK_X] = SDLK_x;
	DIK_keymap[DIK_C] = SDLK_c;
	DIK_keymap[DIK_V] = SDLK_v;
	DIK_keymap[DIK_B] = SDLK_b;
	DIK_keymap[DIK_N] = SDLK_n;
	DIK_keymap[DIK_M] = SDLK_m;
	DIK_keymap[DIK_COMMA] = SDLK_COMMA;
	DIK_keymap[DIK_PERIOD] = SDLK_PERIOD;
	DIK_keymap[DIK_SLASH] = SDLK_SLASH;
	DIK_keymap[DIK_RSHIFT] = SDLK_RSHIFT;
	DIK_keymap[DIK_MULTIPLY] = SDLK_KP_MULTIPLY;
	DIK_keymap[DIK_LMENU] = SDLK_LALT;
	DIK_keymap[DIK_SPACE] = SDLK_SPACE;
	DIK_keymap[DIK_CAPITAL] = SDLK_CAPSLOCK;
	DIK_keymap[DIK_F1] = SDLK_F1;
	DIK_keymap[DIK_F2] = SDLK_F2;
	DIK_keymap[DIK_F3] = SDLK_F3;
	DIK_keymap[DIK_F4] = SDLK_F4;
	DIK_keymap[DIK_F5] = SDLK_F5;
	DIK_keymap[DIK_F6] = SDLK_F6;
	DIK_keymap[DIK_F7] = SDLK_F7;
	DIK_keymap[DIK_F8] = SDLK_F8;
	DIK_keymap[DIK_F9] = SDLK_F9;
	DIK_keymap[DIK_F10] = SDLK_F10;
	DIK_keymap[DIK_NUMLOCK] = SDLK_NUMLOCK;
	DIK_keymap[DIK_SCROLL] = SDLK_SCROLLOCK;
	DIK_keymap[DIK_NUMPAD7] = SDLK_KP7;
	DIK_keymap[DIK_NUMPAD8] = SDLK_KP8;
	DIK_keymap[DIK_NUMPAD9] = SDLK_KP9;
	DIK_keymap[DIK_SUBTRACT] = SDLK_KP_MINUS;
	DIK_keymap[DIK_NUMPAD4] = SDLK_KP4;
	DIK_keymap[DIK_NUMPAD5] = SDLK_KP5;
	DIK_keymap[DIK_NUMPAD6] = SDLK_KP6;
	DIK_keymap[DIK_ADD] = SDLK_KP_PLUS;
	DIK_keymap[DIK_NUMPAD1] = SDLK_KP1;
	DIK_keymap[DIK_NUMPAD2] = SDLK_KP2;
	DIK_keymap[DIK_NUMPAD3] = SDLK_KP3;
	DIK_keymap[DIK_NUMPAD0] = SDLK_KP0;
	DIK_keymap[DIK_DECIMAL] = SDLK_KP_PERIOD;
	DIK_keymap[DIK_F11] = SDLK_F11;
	DIK_keymap[DIK_F12] = SDLK_F12;

	DIK_keymap[DIK_F13] = SDLK_F13;
	DIK_keymap[DIK_F14] = SDLK_F14;
	DIK_keymap[DIK_F15] = SDLK_F15;

	DIK_keymap[DIK_NUMPADEQUALS] = SDLK_KP_EQUALS;
	DIK_keymap[DIK_NUMPADENTER] = SDLK_KP_ENTER;
	DIK_keymap[DIK_RCONTROL] = SDLK_RCTRL;
	DIK_keymap[DIK_DIVIDE] = SDLK_KP_DIVIDE;
	DIK_keymap[DIK_SYSRQ] = SDLK_PRINT;
	DIK_keymap[DIK_RMENU] = SDLK_RALT;
	DIK_keymap[DIK_PAUSE] = SDLK_PAUSE;
	DIK_keymap[DIK_HOME] = SDLK_HOME;
	DIK_keymap[DIK_UP] = SDLK_UP;
	DIK_keymap[DIK_PRIOR] = SDLK_PAGEUP;
	DIK_keymap[DIK_LEFT] = SDLK_LEFT;
	DIK_keymap[DIK_RIGHT] = SDLK_RIGHT;
	DIK_keymap[DIK_END] = SDLK_END;
	DIK_keymap[DIK_DOWN] = SDLK_DOWN;
	DIK_keymap[DIK_NEXT] = SDLK_PAGEDOWN;
	DIK_keymap[DIK_INSERT] = SDLK_INSERT;
	DIK_keymap[DIK_DELETE] = SDLK_DELETE;
	DIK_keymap[DIK_LWIN] = SDLK_LMETA;
	DIK_keymap[DIK_RWIN] = SDLK_RMETA;
	DIK_keymap[DIK_APPS] = SDLK_MENU;
}

static SDL_keysym *TranslateKey(UINT scancode, SDL_keysym *keysym, int pressed)
{
	/* Set the keysym information */
	keysym->scancode = (unsigned char)scancode;
	keysym->sym = DIK_keymap[scancode];
	keysym->mod = KMOD_NONE;
	keysym->unicode = 0;
	if ( pressed && SDL_TranslateUNICODE ) {
		UINT vkey;
#ifndef NO_GETKEYBOARDSTATE
		BYTE	keystate[256];
		Uint16	wchars[2];
#endif

		vkey = MapVirtualKey(scancode, 1);
#ifdef NO_GETKEYBOARDSTATE
		/* Uh oh, better hope the vkey is close enough.. */
		keysym->unicode = vkey;
#else
		GetKeyboardState(keystate);
		if (SDL_ToUnicode(vkey, scancode, keystate, wchars, sizeof(wchars)/sizeof(wchars[0]), 0) == 1)
		{
			keysym->unicode = wchars[0];
		}
#endif /* NO_GETKEYBOARDSTATE */
	}
	return(keysym);
}

int DX5_CreateWindow(_THIS)
{
	char *windowid = SDL_getenv("SDL_WINDOWID");
	int i;

	/* Clear out DirectInput variables in case we fail */
	for ( i=0; i<MAX_INPUTS; ++i ) {
		SDL_DIdev[i] = NULL;
		SDL_DIevt[i] = NULL;
		SDL_DIfun[i] = NULL;
	}

	SDL_RegisterApp(NULL, 0, 0);

	SDL_windowid = (windowid != NULL);
	if ( SDL_windowid ) {
		SDL_Window = (HWND)SDL_strtoull(windowid, NULL, 0);
		if ( SDL_Window == NULL ) {
			SDL_SetError("Couldn't get user specified window");
			return(-1);
		}

		/* DJM: we want all event's for the user specified
			window to be handled by SDL.
		 */
		userWindowProc = (WNDPROCTYPE)GetWindowLongPtr(SDL_Window, GWLP_WNDPROC);
		SetWindowLongPtr(SDL_Window, GWLP_WNDPROC, (LONG_PTR)WinMessage);
	} else {
		SDL_Window = CreateWindow(SDL_Appname, SDL_Appname,
                        (WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX),
                        CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, NULL, NULL, SDL_Instance, NULL);
		if ( SDL_Window == NULL ) {
			SDL_SetError("Couldn't create window");
			return(-1);
		}
		ShowWindow(SDL_Window, SW_HIDE);
	}

	/* Initialize DirectInput */
	if ( DX5_DInputInit(this) < 0 ) {
		return(-1);
	}

	/* JC 14 Mar 2006
		Flush the message loop or this can cause big problems later
		Especially if the user decides to use dialog boxes or assert()!
	*/
	WIN_FlushMessageQueue();

	/* Ready to roll */
	return(0);
}

void DX5_DestroyWindow(_THIS)
{
	/* Close down DirectInput */
	DX5_DInputQuit(this);

	/* Destroy our window */
	if ( SDL_windowid ) {
		SetWindowLongPtr(SDL_Window, GWLP_WNDPROC, (LONG_PTR)userWindowProc);
	} else {
		DestroyWindow(SDL_Window);
	}
	SDL_UnregisterApp();

	/* JC 14 Mar 2006
		Flush the message loop or this can cause big problems later
		Especially if the user decides to use dialog boxes or assert()!
	*/
	WIN_FlushMessageQueue();
}